4581CS 查看數據表（PDF） - Intersil
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4581CS Datasheet PDF : 10 Pages
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EL4581
Pin Descriptions
PIN NUMBER
PIN NAME
1
Composite Sync Out
2
Composite Video in
3
Vertical Sync Out
4
GND
5
Burst/Back Porch Output
6
RSET (Note 8)
7
Odd/Even Output
8
VDD 5V
NOTE:
8. RSET must be a 1% resistor.
FUNCTION
Composite sync pulse output. Sync pulses start on a falling edge and end on a rising edge.
AC coupled composite video input. Sync tip must be at the lowest potential (Positive picture phase).
Vertical sync pulse output. The falling edge of Vert Sync is the start of the vertical period.
Supply ground.
Burst/Back porch output. Low during burst portion of composite video.
An external resistor to ground sets all internal timing. 681k, 1% resistor will provide correct timing
for NTSC signals.
Odd/Even field output. Low during odd fields, high during even fields. Transitions occur at start of
Vert Sync pulse.
Positive supply. (5V)
Typical Performance Curves
1000
900
800
700
600
500
400
300
200
100
10 15 20 25 30 35 40 45 50
FREQUENCY (kHz)
FIGURE 1. RSET vs HORIZONTAL FREQUENCY
1000
800
600
400
200
0
0
2
4
6
8
10
CLAMP TIME (µs)
FIGURE 2. BACK PORCH CLAMP, ON-TIME vs RSET
1000
800
600
400
200
0
0
100
200
300 400
500
VERTICAL PULSE WIDTH (µs)
FIGURE 3. VERTICAL PULSE WIDTH vs RSET
1000
800
600
400
200
0
0
20
40
60
80
100
DELAY TIME (µs)
FIGURE 4. VERTICAL DEFAULT DELAY, TIME vs RSET
350
300
250
200
150
-55
-25 5
35 65 95 125
TEMPERATURE (°C)
FIGURE 5. VERTICAL PULSE WIDTH vs TEMPERATURE
3
2.0
1.5
1.0
0.5
-55
-25 5
35 65 95 125
TEMPERATURE (°C)
FIGURE 6. SUPPLY CURRENT vs TEMPERATURE
FN7172.2
November 12, 2010
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